Improvement in vises



ALEXANDER DICK, 0F

BUFFALO, NEW YORK.

Letters Patent No. 108,335, dated October 18, 1870.

IMPROVEMENT IN VISES.

The Schedule referred to in these Letters Patent and making part of the same.

To all 'whom itmafy concern:

Y coing-attachment.

Figure 1I is a view further delineating a part of said attachment.

' My invention is twofold:

lirst, the fixed part ot the swivel-vise Y, Fig. I, I prefer to make with its bolt B cast firmly into its circular base D I), and its sides SS sloping outwardly, giving a greater strengthof metal at the lower part a. than at the upper part c. In other respects it may be made in any of the known ways, but I prefer it as above stated, for thus the bolt B, if its-head be properly formed, can never turn or draw from its socket, and the vise is very much stronger when the sides S S are thus formed, though the casting itself be no heavier, for there is increased strength where the casting is most likely to break. Any one skilled in the art can make the casting V, with the bolt B, formed and placed as indicated, in the way and manner that is usual in such cases.

Second, the fasteniiig-attachment a; y, Fig. I, I call a ca1n-w1'ench,a1ul is novel in design and use.. Itcensists of two parts,v:v and y, which may very fitlv be made of iron, and cast in the form required.

These parts are hinged together with a pin, as shown in tigure, the end 'e ot'y heilig inserted in a slot in the end of v The end c of y is an eccentric or cam, as pivotcd to fr, and is operated bythe lever L, the other cnd of y.

In thc center of the part .1: there is a hole, slightly larger than the boit B which is passed through it, and its two sides extend downward, in the form oi' flanges, so as to receive the nut N of the bolt B.

'Ihese flanges are shown in Fig. II, where :l: is in a reversed position.

I will now explain the use and action of this ruachine:

Let the visc to be held be placed in position, with the bolt B passing through and under the bench, (see Fig. I.) The washer W is now passed upon the bolt B and the cam-wrench n; y, as shown in figure. The nutN is now screwed upon the boltB a short distance, the part z being held above' and clear of it. Ihe part :c may now be allowed to come down upon the nut N, which it receives in part, as in socket, within its flanges, which embrace it closely on two sides. Let now the lever L he extended by raising it, if necessary, and it will operate the nut N on B as a wrench,

the iiangcs of :c turning the nut N, while it is itself turned on B with the lever L. In this manner let the nut N be screwed upon B till the washer \V comes in contact withtlie lower surface of the bench, the part y being, at the same time, in the same direction with the part fr, for in this position the throw of the cam c is not made. Let now therlever L be forced downward, the throw of the cam will, at the same time, be made, and should be completed when y comes to the vertical position.

'Ihe throw ot' the cam will force the end of the 1ever fr, to which it is attached away from the washer IV, on which it acts. At the same time, the force of this action will becommunicat-ed to the nut N and t0 the bolt B, and will hold the vise firmly in position.

Let it be observed that, if the nut N be square,

which is the form I approve, there will be'four different positions of a: upon it, so that au adjustment may always be made so as to leave y in any desired direction, while, at the same time, the throw of the cam shall be completed with the desired degree of force.

It will be notice-d that, by simply raising the lever L, the vise is loosened, so thatjit may be turned to any angle with the bench that may be desired, and, by again loweringl the lever, it is secured in that position.

r[he advantage ot' this machine lies not only in its great convenience, but also in its immense power.

The power of the cani is greater than that of the screw; but, the part :l: being a lever of the second kind, if its arms are equal, this great power of the cani is duplicated iu holding the vise firmly.

It is obvious that this cam-wrench may be applied to many other uses beside the one described above, such as the fastening down ot'lathe-hcads, &c. Generally, it may be used to advantage in all cases where it is desirable to apply much force in drawing upon a rod or bolt, or where it is an object to be able to apply and remove such force with facility.

I do not-,in this invention, claim any addition of parts to the swivcl-vises now in use, except in so far as the cani-wrench c: y may be considered such addition; but

1. The form, described and shown, of the part V, and, jointly with said part, the bolt B, connected thereto by casting the part V upon and around the head of said bolt, as set forth.

2. rlhc combination of the clamping devices :c y with the nut N, washer `\V, and bolt B, substantially as described.

ALEXANDER DICK.

Witnesses:

LYMAN l). Pnnnnvs, A. B. TowNLnY. 

